%I #5 Oct 02 2021 10:26:36
%S 239,388741,668597561,1170461488239,2055191230733819,
%T 3609497709468161601
%N Number of n X 7 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, with no occupancy greater than 2.
%C Column 7 of A221303.
%e Some solutions for n=3
%e ..0..1..1..1..1..2..1....0..1..1..2..2..1..2....0..1..1..2..2..2..1
%e ..0..1..2..0..1..1..1....0..1..1..0..0..2..1....0..1..1..0..0..0..0
%e ..0..1..1..2..2..0..2....0..1..2..2..1..1..0....0..1..2..1..2..2..2
%Y Cf. A221303.
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 09 2013